Effects of Light Emitting Diode High Intensity on Growth of Lettuce (Lactuca sativa L.) and Broccoli (Brassica oleracea L.) Seedlings

Pardo, G.; Hernández-Aguilar, C.; Martínez, F.; Pacheco, Arturo Domínguez; González, Carmen Martínez; Canseco, M. Martínez

doi:10.9734/arrb/2014/10526

Cited by 16 publications

(4 citation statements)

References 48 publications

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“…Available research is concentrated on the effects of LED irradiance during seedlings growth; both in closed environment chambers and in greenhouses (as supplemental lighting) [17,18]. Moreover, few works are focused on broccoli seedlings under LED light [19]. Most studies showed the beneficial effects of red light (670-700 nm) combined with blue light (425-490 nm) on seedling quality but the proper ratio of red to blue light seems to be species/cultivar specific and may vary depending on environment factors and cultivation methods.…”

Section: Introductionmentioning

confidence: 99%

Response of Broccoli Transplants to LED Light during Short and Long-Term Storage

et al. 2020

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In broccoli production a big challenge is preparation of seedlings, which must be delivered during a strictly defined period to vegetable producers that are often in distant places. The goal of the present study was to investigate the response of 5-week old broccoli transplants cv. Parthenon F1 to 2 and 6 weeks of storage at 4 °C under two LED light spectra (L1: 29% red 660 nm + 14% red 630 nm + 42% blue 250 nm + 15% green 520 nm and L2: 38% red 660 nm + 18% red 630 nm +26% blue 450 nm + 15% green 520 nm + 3% UV-A 330 nm; photoperiod 16/8 h day/night and PPFD 30 ± 10 µmol m−2 s−1) and darkness. Control 5-week-old seedlings were not stored. Light treatment improved the morphology and physiological parameters of seedlings. The yield of broccoli from control seedlings was similar to that obtained after L2 treatment, regardless of seedling storage duration. The most promising effects were obtained by adding 3% UV-A radiation to the lighting spectrum. The results are applicable to the transport of broccoli transplants to remote locations or storage for several weeks, in cases where it is necessary to delay planting.

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Section: Introductionmentioning

confidence: 99%

Response of Broccoli Transplants to LED Light during Short and Long-Term Storage

et al. 2020

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“…Очевидно, что значение имеет спектральный диапазон излучаемой световой энергии. Наибольшее значение имеют синий и красный спектры и их сочетание в облучательной установке [6][7][8][9][10].…”

Section: новые технологии и оборудованиеunclassified

Comparative Assessment of Sodium and LED Greenhouse Irradiators Main Characteristics

et al. 2020

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The authors showed that traditional sodium greenhouse irradiators are being replaced by more efficient LED ones. (Research purpose) To conduct a comparative assessment of the main characteristics of sodium and LED greenhouse irradiators with an equal photosynthetic photon flux. (Materials and methods) The authors collected a database of 79 sodium irradiators (34 irradiators with electronic ballasts and 45 – with electromagnetic) and 118 – LED. A comparative assessment was carried out in two stages. At the first stage mathematical models of the power, mass, area and cost of irradiation facilities dependence on the photosynthetic photon flux generated by them were obtained. At the second stage the system of equations of sodium and LED greenhouse irradiators for each characteristic were solved. (Results and discussion) The consumed active power of LED irradiators is on average 33 percent less compared to sodium. The area of LED illuminators is 2.5 times larger than sodium irradiators with electronic ballast and 44 percent more than sodium irradiators with electromagnetic ballast. The LED irradiators mass is 3.5 times more than sodium with electronic ballast and 20 percent more than sodium with electromagnetic ballast. The cost of LED illuminators is 3.5 and 4.3 times higher. (Conclusions) LED irradiators are more energy efficient compared to sodium ones. However, due to the high cost, their implementation requires a feasibility study, including additional evaluation criteria: service life, operating costs, electricity price and others.

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“…Faktor lingkungan yang berpengaruh terhadap perkecambahan benih yaitu kelembaban, temperatur, oksigen, dan kadang-kadang bagi benih tertentu diperlukan pula cahaya (Kartasapoetra, 2003;Boyd dan Acker, 2004;Washa, 2015). Selain faktor lingkungan, cahaya dengan intensitas tinggi yang mampu meningkatkan pertumbuhan kecambah (Darko et al, 2014;Pardo et al, 2014;Ooi et al, 2016).…”

Section: Uji Daya Tumbuhunclassified

Analysis of Seed Sweet Corn in Terms of Water Content, Refraction, and Germination

Ihwah

Putra

2016

JTP

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Jagung manis merupakan salah satu komoditas unggulan di PT. Bisi International Tbk selain beras hibrida dan benih sayuran di Indonesia. Pengendalian mutu produk akhir perlu dilakukan pada benih hasil proses ayak gravity, work in process (WIP), dan benih siap dikemas. Pengendalian mutu pada jagung manis meliputi uji kadar air, uji refraksi, uji daya tumbuh. PT. Bisi International menetapkan standar kadar air untuk jagung manis sebesar 9%-10%, daya tumbuh minimal 85%, dan kemurnian minimal 98%. Pada 4 sampel yang digunakan, uji kadar air hanya menggunakan salah satu sampel. Hal ini disebabkan karena sampel diambil dari varietas dan job yang sama, sehingga kadar air pada salah satu sampel dapat mewakili kadar air pada seluruh sampel. Pengujian kadar air dilakukan sebanyak dua kali ulangan. Uji refraksi dengan sortir manual dilakukan dengan cara menghamparkan benih diatas kertas alas dan diamati secara teliti berdasarkan kriteria refraksi yang sudah ditentukan. Uji vigor dan daya tumbuh dilakukan dengan metode Uji Kertas Digulung dalam plastik (UKDdp). Uji vigor dan daya tumbuh dilakukan dengan mengecambahkan benih diatas media tumbuh dengan empat ulangan pada setiap perlakuannya. Berdasarkan hasil pengamatan dapat disimpulkan bahwa benih jagung manis yang lolos gravity memiliki kualitas paling baik

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Effects of Light Emitting Diode High Intensity on Growth of Lettuce (Lactuca sativa L.) and Broccoli (Brassica oleracea L.) Seedlings

Cited by 16 publications

References 48 publications

Response of Broccoli Transplants to LED Light during Short and Long-Term Storage

Response of Broccoli Transplants to LED Light during Short and Long-Term Storage

Comparative Assessment of Sodium and LED Greenhouse Irradiators Main Characteristics

Analysis of Seed Sweet Corn in Terms of Water Content, Refraction, and Germination

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